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16.   Angle 2 is 30° and angles 1 & 3 are 150°

17. Equilateral (all sides are equal)

18. A, B, D

19. A, B. (8 angles and all sides are congruent)

20. False.

Step-by-step explanation:

angle 2 is a corresponding (ish) angle to the one marked 30°, so they are the same. and then the other angle is supplementary to the 30° one, therefore they must add up to 180 degrees. 180-30= 150 so that is angle 1 and 3.

For the first question angle 1 and 2 the answer is 120 and angle 3 is 30

question two the triangle is an equilateral

Question three the rectangle is also a square and has congruent angles

question 4 it has 8 sides

Step-by-step explanation:

answer: the anser is 3

step-by-step explanation:

c- 2o is equal to 9

answer: -1

step-by-step explanation: